A type of anti-theft screw for car license plates

Abstract

This utility model relates to the field of anti-theft screw technology and discloses an anti-theft screw for car license plates. When installation is required, a tool is inserted into the drive groove of the nut and rotated to screw the screw in and secure it. After installation, the anti-theft sleeve is tightened to fit snugly against the license plate. In its natural state, the elastic pad inside the nut pushes the protrusions on both sides outward, occupying the drive groove space, preventing conventional tools from fully inserting into the groove bottom, effectively engaging, and transmitting torque, thus achieving anti-theft. When disassembly is required, the user first rotates the anti-theft sleeve to precisely align the positioning groove with the positioning plate, then inserts the tool into the drive groove at the top of the nut. During insertion, the tool simultaneously squeezes the protrusions on both sides, forcing them to overcome the elasticity of the pad and retract into the mounting groove. This action moves the connected positioning plate into the positioning groove of the anti-theft sleeve. At this point, rotating the nut with the tool will cause the screw to unscrew, thus achieving a reliable anti-theft function.

Description

Technical Field

[0001] This utility model belongs to the field of anti-theft screw technology, specifically an anti-theft screw for car license plates. Background Technology

[0002] In current technology, vehicle license plate installation commonly uses traditional fasteners or specialized anti-theft screws. Traditional bolts have a simple structure and can be directly removed with general-purpose tools, but their anti-theft performance is poor and they are easily stolen. While some specialized anti-theft screws are effective in preventing theft, they usually rely on unique and non-standard drive structures and require specific tools for installation and removal. Once the specialized tools are lost, even the vehicle owner will find it difficult to remove them properly, hindering legitimate daily needs such as maintenance and license plate replacement. Therefore, improvements are needed to address the current situation. Utility Model Content

[0003] To address the above issues and overcome the shortcomings of existing technologies, this utility model provides an anti-theft screw for vehicle license plates, effectively solving the problem that in the current technology, vehicle license plate installation generally uses traditional fasteners or special anti-theft screws. Traditional bolts have a simple structure and can be directly disassembled with general-purpose tools, but their anti-theft performance is poor and they are easily stolen. While some special anti-theft screws can effectively prevent theft, they usually rely on unique and non-standard drive structures and require specific special tools for installation and removal. Once the special tools are lost, even the vehicle owner will find it difficult to remove them properly, thus hindering legitimate daily needs such as maintenance and license plate replacement.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an anti-theft screw for car license plates, comprising a screw, a nut, and an anti-theft sleeve. The nut is connected to one end of the screw, and the anti-theft sleeve is screwed onto the outer wall of the nut. A driving groove is provided on the top of the nut, and mounting grooves are provided on both sides of the inner cavity of the nut. An elastic washer is connected inside each of the mounting grooves on both sides, and a protrusion is connected to the opposite side of each elastic washer on both sides. A positioning plate is connected to one side of each protrusion on both sides, and a positioning groove is provided on the inner wall of the anti-theft sleeve. The positioning plate matches the positioning groove.

[0005] Preferably, the drive slot is hexagonal in shape.

[0006] Preferably, the protrusions on both sides are inclined and arranged opposite to each other.

[0007] Preferably, the inner wall of the anti-theft sleeve is provided with a groove, and the inside of the groove is coated with a warning paint.

[0008] Preferably, the surface of the anti-theft sleeve is coated with a wear-resistant layer.

[0009] Preferably, the nut is housed entirely within the anti-theft sleeve, and the outer surface of the nut is fully covered by the anti-theft sleeve.

[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. When installation is required, use a tool to insert into the drive groove at the top of the nut and rotate it. At this time, the nut will drive the screw to screw in. After installation, rotate the anti-theft sleeve to make it fit tightly against the car license plate. In the natural state, the elastic pad in the mounting groove inside the nut will push the protrusions on both sides outward, so that they partially invade and occupy the space of the drive groove. This makes it impossible for conventional screwdrivers or sockets to be fully and smoothly inserted into the bottom of the drive groove to obtain effective engagement and torque, thus preventing the screw from being turned and achieving the anti-theft function. 2. When disassembly is required, the user first rotates the outer anti-theft sleeve to precisely align the positioning groove on its inner wall with the positioning plate inside the nut. Then, the tool is inserted into the drive groove on the top of the nut. During insertion, the tool simultaneously presses against the protrusions on both sides, forcing the protrusions to retract into the mounting groove against the elasticity of the elastic pad. This action moves the connected positioning plate into the positioning groove of the anti-theft sleeve. At this point, rotating the nut with the tool will unscrew the screw, thus achieving a reliable anti-theft function. 3. The drive slot adopts an internal hexagonal structure. The advantage of this standardized interface is that it does not require special tools. You can simply use a common hex wrench to insert into the drive slot and apply torque to directly remove the screw. This greatly improves the convenience of daily maintenance. Disassembly and installation can be carried out without special tools, avoiding the situation where the anti-theft screw cannot be removed due to the loss of special tools. Attached Figure Description

[0011] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0012] In the attached diagram: Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a schematic diagram of the drive groove structure of this utility model; Figure 3 This is a schematic diagram of the protrusion structure of this utility model; Figure 4 This is a schematic diagram of the positioning groove structure of this utility model; Figure 5 This is a schematic diagram of the elastic pad structure of this utility model.

[0013] In the diagram: 100, screw; 200, nut; 201, anti-theft sleeve; 202, drive groove; 203, mounting groove; 204, elastic pad; 205, protrusion; 206, positioning plate; 207, positioning groove; 208, groove. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-5 An anti-theft screw for car license plates, characterized in that it includes a screw 100, a nut 200, and an anti-theft sleeve 201. The nut 200 is fixedly connected to one end of the screw 100, and the anti-theft sleeve 201 is screwed onto the outer wall of the nut 200. A drive groove 202 is formed on the top of the nut 200. Installation grooves 203 are formed on both sides of the inner cavity of the nut 200. Elastic washers 204 are fixedly connected inside the installation grooves 203 on both sides. Protrusions 205 are fixedly connected to opposite sides of the elastic washers 204 on both sides. Positioning plates 206 are fixedly connected to one side of each protrusion 205 on both sides. A positioning groove 207 is formed on the inner wall of the anti-theft sleeve 201. The positioning plate 206 matches the positioning groove 207. When installation is required, a tool is inserted into the drive groove 202 on the top of the nut 200 and rotated. At this time, the nut 200 drives the screw 100 to screw in, thus securing the license plate. After installation, rotate the anti-theft sleeve 201 to make it fit snugly against the license plate. In its natural state, the elastic pad 204 in the mounting groove 203 inside the nut 200 pushes the protrusions 205 on both sides outward, causing them to partially invade and occupy the space of the drive groove 202. This prevents conventional screwdrivers or sockets from being fully and smoothly inserted into the bottom of the drive groove 202 to obtain effective engagement and torque, thus preventing the screw 100 from turning and achieving the anti-theft function. When disassembly is required, the user first rotates the outer anti-theft sleeve 201 to precisely align the positioning groove 207 on its inner wall with the positioning plate 206 inside the nut. Then, the tool is inserted into the drive groove 202 at the top of the nut 200. During the insertion process, the tool will simultaneously squeeze the protrusions 205 on both sides, forcing the protrusions 205 to overcome the elastic force of the elastic pad 204 and retract into the mounting groove 203. This action causes the positioning plate 206 connected to it to move into the positioning groove 207 of the anti-theft sleeve. At this time, the screw 100 can be screwed out by turning the nut 200 with a tool, thus realizing a reliable anti-theft function.

[0016] The drive slot 202 is hexagonal in shape. The advantage of this standardized interface is that it does not require special tools. A common hex wrench can be used to insert into the drive slot 202 and apply torque to directly remove the screw 100. This greatly improves the convenience of daily maintenance. Disassembly and installation can be carried out without special tools, avoiding the situation where the anti-theft screw cannot be removed due to the loss of special tools.

[0017] The two protrusions 205 are inclined and set opposite to each other. The inclined surfaces naturally form a guide structure. When the tool is inserted into the drive groove 202, the side of the tool can smoothly apply pressure along the inclined surface of the protrusion, forcing the protrusion 205 to retract into the mounting groove 203 more efficiently and reducing friction loss.

[0018] The inner wall of the anti-theft sleeve 201 has a groove 208, and the inside of the groove 208 is coated with a prompting paint. The prompting paint forms a clear visual mark in the groove 208. When the user needs to remove it, he / she only needs to rotate the outer anti-theft sleeve 201 and observe the prompting paint to stop rotating the anti-theft sleeve 201. This avoids blindly searching. Even non-professionals can quickly and accurately complete the alignment of the unlocking position with this prompt, improving the disassembly efficiency and user experience.

[0019] The surface of the anti-theft sleeve 201 is coated with a wear-resistant layer, which greatly improves the surface hardness and scratch resistance of the anti-theft sleeve 201. This makes it extremely difficult to clamp or forcibly disassemble using common tools such as pliers, pipe wrenches, and chisels, because the tools are difficult to grip the smooth and hard surface and are prone to slipping. This effectively resists illegal disassembly attempts through friction and mechanical damage, strengthening the core anti-theft function.

[0020] The nut 200 is completely housed inside the anti-theft sleeve 201, and the outer surface of the nut 200 is fully covered by the anti-theft sleeve 201. This structure ensures that no part of the outer surface of the nut 200 is exposed. This means that any standard or modified screwdriver, socket, wrench, pliers, or other tools cannot directly contact, engage, or jam the body of the nut 200 from the side or any angle.

[0021] Working principle: When installation is required, insert a tool into the drive groove 202 at the top of the nut 200 and rotate it. At this time, the nut 200 drives the screw 100 to screw in. After installation, rotate the anti-theft sleeve 201 to make it fit tightly against the license plate. In its natural state, the elastic pad 204 in the mounting groove 203 inside the nut 200 pushes the protrusions 205 on both sides outward, causing them to partially invade and occupy the space of the drive groove 202. This prevents conventional screwdrivers or sockets from being fully and smoothly inserted into the bottom of the drive groove 202 to obtain effective engagement and torque, thus preventing the screw 100 from turning and achieving the anti-theft function. When disassembly is required, the user first rotates the outer anti-theft sleeve 201 to precisely align the positioning groove 207 on its inner wall with the positioning plate 206 inside the nut. Then, insert the tool into the drive groove 202 at the top of the nut 200. During the insertion process, the tool will simultaneously squeeze the protrusions 205 on both sides, forcing the protrusions 205 to overcome the elastic force of the elastic pad 204 and retract into the mounting groove 203. This action causes the positioning plate 206 connected to it to move into the positioning groove 207 of the anti-theft sleeve. At this time, the screw 100 can be unscrewed by turning the nut 200 with a tool, thus realizing a reliable anti-theft function. The drive groove 202 adopts an internal hexagonal structure. The advantage of this standardized interface is that it does not require special tools. A common hex wrench can be inserted into the drive groove 202 and torque can be applied to directly remove the screw 100. This greatly improves the convenience of daily maintenance. Disassembly and installation can be carried out without special tools, avoiding the situation where the anti-theft screw cannot be removed due to the loss of special tools.

Claims

1. An anti-theft screw for car license plates, characterized in that: The device includes a screw (100), a nut (200), and an anti-theft sleeve (201). The nut (200) is connected to one end of the screw (100), and the anti-theft sleeve (201) is screwed onto the outer wall of the nut (200). The top of the nut (200) is provided with a drive groove (202). Both sides of the inner cavity of the nut (200) are provided with mounting grooves (203). The interior of both mounting grooves (203) is connected with elastic pads (204). The opposite sides of both elastic pads (204) are connected with protrusions (205). One side of both protrusions (205) is connected with a positioning plate (206). The inner wall of the anti-theft sleeve (201) is provided with a positioning groove (207), and the positioning plate (206) matches the positioning groove (207).

2. The anti-theft screw for car license plates according to claim 1, characterized in that: The drive slot (202) is hexagonal in shape.

3. The anti-theft screw for car license plates according to claim 1, characterized in that: The protrusions (205) on both sides are inclined and are arranged opposite to each other.

4. The anti-theft screw for car license plates according to claim 1, characterized in that: The inner wall of the anti-theft sleeve (201) is provided with a groove (208), and the inside of the groove (208) is coated with a warning paint.

5. The anti-theft screw for car license plates according to claim 1, characterized in that: The surface of the anti-theft sleeve (201) is coated with a wear-resistant layer.

6. The anti-theft screw for car license plates according to claim 1, characterized in that: The nut (200) is housed inside the anti-theft sleeve (201), and the outer surface of the nut (200) is fully covered by the anti-theft sleeve (201).

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